The girls of The iDOLM@STER (sometimes spelled The Idolmatster) dress up as fruits for one of their photo shoots. This is either some multifaceted visual metaphor trying to legitimize homosexuality in the conservative country of Japan or an underwear commercial. The twins Ami and Mami pair up as a banana and a lemon (which have been scientifically proven to be the best two fruits). Ami, being the slightly better twin, decides to go with the much-loved lemon. With a lemon hat and lemon breasts, she steals the show and eventually goes on to become The iDOLM@STER.
